ADF4212BRUZ-RL7

Overview

The ADF4212BRUZ-RL7 is a dual RF/IF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It operates with a supply voltage of 2.7 V to 5.5 V and supports an RF input frequency range of 0.15 GHz to 2.7 GHz at 3 V operation. The device integrates two independent phase-locked loops, each featuring a programmable dual-modulus prescaler (8/9, 16/17, 32/33, or 64/65), separate charge pumps, and reference dividers. It utilizes a 3-wire serial interface for register control and includes features such as Fastlock mode and power-down functionality.

Feature Summary

• Dual integer-N PLL architecture supporting simultaneous RF and IF synthesis
• RF input frequency range of 0.15 GHz to 2.7 GHz (at 3 V supply)
• Programmable dual-modulus prescaler options: 8/9, 16/17, 32/33, 64/65
• Separate charge pump supplies (VP) allow extended tuning voltages up to 6 V

Applications

• Base stations for wireless radio systems including GSM, PCS, DCS, CDMA, and WCDMA
• Wireless handsets and mobile communication devices
• Communications test equipment requiring precise frequency synthesis

Procurement Notes

Verify the specific suffix 'RL7' against the manufacturer's current ordering guide, as standard datasheets may list 'RU' (TSSOP) or 'BCP' (CSP) packages without reel specifications. Confirm that the B-version industrial temperature rating (-40°C to +85°C) meets system requirements. Ensure ESD precautions are observed during handling due to the device's sensitivity.

Selection Notes

Select the ADF4212BRUZ-RL7 when an RF output frequency up to 2.7 GHz is required, distinguishing it from the ADF4210 (1.2 GHz) and ADF4211 (2.0 GHz). Verify that the maximum prescaler output frequency constraint (200 MHz at 5 V) allows for the desired division ratios. Ensure the external VCO tuning voltage range is compatible with the separate VP supply capability.

Part Context

This component belongs to the ADF421x family of dual synthesizers, which also includes the ADF4210, ADF4211, and ADF4213. The primary differentiator within this family is the maximum operating frequency of the RF section. The ADF4212 specifically targets applications requiring coverage up to 2.7 GHz, bridging the gap between the lower-frequency ADF4211 and the higher-frequency ADF4213.

Replacement Considerations

The ADF4211BRUZ-RL7 serves as a lower-frequency alternative if the application does not require outputs above 2.0 GHz. For higher frequency needs up to 3.0 GHz, the ADF4213BRUZ-RL7 is the appropriate replacement. Package variations exist; the 'RU' suffix denotes TSSOP-20, while 'BCP' denotes CSP-20.